Returns the binary HTTPS response (i.e. the file).
"""
- url = self.base_url + '/webui/download?type=backup'
+ url = self.base_url + '/webui/download'
post_vars = {'type': 'backup'}
post_data = urllib.parse.urlencode(post_vars).encode('ascii')
with self.opener.open(url, post_data) as response: